General description This is a professional-quality insert bit set designed for durability and precision. The Draper Expert 10581 Titanium Nitride Coated 5.5mm 1/4' Hex Plain Slot Insert Bits are suitable for various DIY and home improvement tasks, providing reliable performance and ease of use. Technical specifications Size: 5.5mm Length: 50mm Coating: Titanium Nitride Type: 1/4' Hex Plain Slot Pack: 5 bits Usage Use for tightening or loosening screws with a 1/4' hex drive. Ideal for professional and DIY applications requiring precise torque and grip. Other information Manufactured to high standards for durability and precision.